EP1077164B1 - Palier d'essuie-glace - Google Patents

Palier d'essuie-glace Download PDF

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Publication number
EP1077164B1
EP1077164B1 EP00115259A EP00115259A EP1077164B1 EP 1077164 B1 EP1077164 B1 EP 1077164B1 EP 00115259 A EP00115259 A EP 00115259A EP 00115259 A EP00115259 A EP 00115259A EP 1077164 B1 EP1077164 B1 EP 1077164B1
Authority
EP
European Patent Office
Prior art keywords
component
teeth
drive shaft
height
edges
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP00115259A
Other languages
German (de)
English (en)
Other versions
EP1077164A2 (fr
EP1077164A3 (fr
Inventor
Wilfried Merkel
Roger Daenen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1077164A2 publication Critical patent/EP1077164A2/fr
Publication of EP1077164A3 publication Critical patent/EP1077164A3/fr
Application granted granted Critical
Publication of EP1077164B1 publication Critical patent/EP1077164B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/34—Wiper arms; Mountings therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/34—Wiper arms; Mountings therefor
    • B60S1/3488—Means for mounting wiper arms onto the vehicle
    • B60S1/3493—Means for mounting the wiper shaft in the wiper bearing

Definitions

  • the invention is based on a wiper bearing according to the preamble of claim 1, see US 5699582 A.
  • the board carries a wiper drive with a wiper motor, whose motor shaft drives cranks via a linkage, the one end of a drive shaft for everyone Wipers are firmly connected. It is also possible that only the drive shaft of a wiper from the wiper motor is driven while another wiper is over a four-bar linkage with the first wiper is connected and has a bearing axis.
  • the drive shaft or the bearing axis is stored in a wiper bearing. in the The following is a description of a drive shaft for a bearing axis, which is no longer expressly mentioned becomes.
  • the bearing housing is at least one radial bearing and to the End faces between the bearing housing and one with the drive shaft firmly connected part provided an axial bearing.
  • the drive shaft protrudes from the body and moves you wiper arm fastened at its free end with a Wiper blade over a windshield.
  • the wiper arm has usually one that is connected to the drive shaft in a rotationally fixed manner Fastening part that is articulated with a joint part is to which a wiper rod rigidly connects. Further it is possible that the wiper arm is not directly connected to the drive shaft is connected, but with a lever gear driven on the drive shaft rotatably connected drive lever becomes.
  • the following explanations on the connection of the fastening part with the drive shaft also apply to a drive lever that is no longer specifically mentioned becomes.
  • the fastening part instructs one end of a bearing with an inner cone with which the fastening part when assembling the wiper arm in one first assembly step on a correspondingly shaped outer cone the drive shaft is placed. Then in a second assembly step on the drive shaft a nut screwed, over which the fastening part with the inner cone is pressed onto the outer cone of the drive shaft.
  • knurled teeth on the cone of the drive shaft or to form knurled edges is known.
  • the extent depends on Diameter of the drive shaft 29 to 44 knurled blades arranged, aligned in the longitudinal direction of the drive shaft are and a triangular cross-sectional area with an angle of 90 °.
  • the height and cross-sectional area of the Knurled cutting increases with increasing cone diameter too, so that the entire lateral surface of the cone is knurled is covered.
  • the wiper bearing according to the invention has a drive shaft, the via at least one cone connection between a first and a second component directly or indirectly with a Wiper arm is connected.
  • the first component is made of a harder one Material made as the second component and owns Teeth formed on the surface of the cone.
  • the teeth will pressed into the second component when installing the wiper arm and create a positive connection in addition to a frictional connection between the first and the second component, wherein the height of the teeth, i.e. from the tooth base to the tip of the tooth, constant over the surface of the cone is.
  • the teeth deform the material during assembly of the second component evenly.
  • the second component can with a small tightening torque of a fastening nut or with a small axial force on the entire surface of the cone of the first component to be brought to rest.
  • Inserts, especially in plastic fasteners, can be avoided become.
  • inexpensive materials with low Wall thicknesses can be used.
  • the invention is characterized in that with several teeth arranged offset in the longitudinal direction the distance between two in the circumferential direction teeth arranged at the same height and the form fit improved or a high permissible transferable Torque is reached.
  • the teeth can be made with different ones that are suitable to the skilled person appearing methods are molded, such as through non-cutting primary shaping or forming, such as rolling with one Knurling tool, extrusion, deep drawing in sheet metal Components or by machining processes such as milling, Broaching, etc. Furthermore, the teeth can have different shapes, such as pyramid-shaped, conical, etc. In one embodiment of the invention it is proposed that the teeth of substantially longitudinally aligned Cutting edges are formed which are constant in the longitudinal direction Height and preferably a constant cross-sectional area exhibit. Longitudinally aligned Cutting edges can be produced particularly inexpensively and bring about a good form fit.
  • a cone connection can be made with the teeth according to the invention between any components between the drive shaft and the wiper arm can be improved, such as between a thrust piece that is form-fitting on the drive shaft is attached and with an outer cone over a corresponding shaped inner cone of a fastening part a drive torque transfers to the wiper arm.
  • the first component is formed by the drive shaft or the drive shaft has a cone with molded Teeth. Additional components, assembly effort and costs can be saved and in particular series components can be used inexpensively in large quantities getting produced.
  • the wiper arm can be used with a conventional Assembly method is attached to the drive shaft in a particularly rotationally fixed manner become.
  • the distance in the circumferential direction between two teeth at the same axial height on the first Component on the tensile strength of the materials used matched for the first component and for the second component and with decreasing tensile strength of the material for the second component relative to the tensile strength of the material for the first component increases.
  • the shear strength of the teeth on the first component and the material between the teeth of the second component can be matched to one another and overall the greatest possible Shear strength and the greatest possible transferable torque can be achieved. With a larger circumferential distance can have fewer teeth with the same diameter be attached to the cone.
  • the one according to DIN Has a surface hardness of at least 135 HBS to 200 HBS, are advantageous for a second component made of steel 30 to 40 blades with a height of 0.8 to 1.0 mm, with one second component made of zinc or aluminum 20 to 30 cutting edges with a height of 0.7 to 1.1 mm, with a second component made of magnesium 15 to 25 blades with a height of 0.7 to 1.1 mm and 5 to 15 for a second plastic component Cut with a height of 0.7 to 2.0 mm over the circumference molded on the conical surface on the drive shaft.
  • For drive shafts with a smaller or a larger nominal diameter are correspondingly fewer or more cutting edges arranged over the circumference.
  • the permissible maximum loads in the circumferential direction of teeth and that between teeth Material of the second component matched to one another total maximum permissible transmittable torque reached become.
  • Fig. 1 shows a section of a wiper system 36 for a Motor vehicle, the wiper bearing on a board 38 on the Body 40 of the motor vehicle are attached.
  • the circuit board 38 carries a wiper drive with a wiper motor 42, the Motor shaft 44 via a crank 46 and not closer Linkage shown drives cranks 48, each with one end of a drive shaft 10 for a wiper are firmly connected.
  • the drive shaft 10 is in a bearing housing 56 of the wiper bearing radially via bearing bushes 50, 52 and in a first axial direction via a crank arm 54 and in a second axial direction via a clamping ring 58 and a race 60 is mounted (Fig. 2).
  • the drive shaft 10 protrudes from the body 40 and moves one on its free End attached wiper arm 20 with a not shown Wiper blade over a windshield (Fig. 1).
  • the Wiper arm 20 is with a fastening part 18 via a cone connection 16 attached to the drive shaft 10.
  • the fastener 18 is articulated with a via a knee joint 62 Joint part 64 connected to the rigidly a wiper rod 66 connects. In the wiper rod 66 is on a bow-shaped The wiper blade hooked in at the end of 68.
  • the drive shaft 10 is made of a harder material than that Fastening part 18 and has an outer cone 70 in Teeth or knurled blades aligned in the longitudinal direction 22, when mounting the fastening part 18 on the drive shaft 10 in a lateral surface of an inner cone 72 of Fastening part 18 are pressed and next to a frictional connection a positive connection between the drive shaft 10 and the Manufacture fastening part 18 (Fig. 1, 2 and 3).
  • the knurled blades 22 have one in the longitudinal direction constant height 32, i.e. from the tooth base to the tooth tip, are equal to each other and preferably have a constant cross-sectional area. Between the knurled edges 22 result in smooth conical outer surfaces 76.
  • the material of the fastening part 18 uniformly deformed over the length of the knurled edges 22.
  • the fastening part 18 can be tightened with a small torque a fastening nut 74 or with a small axial Force on the entire surface of the cone of the drive shaft 10 to be brought to rest. Only a partial edition of the Fastening part 18 on the tips of the knurled blades 22, in particular at the lower area of the outer cone 70, is avoided and there is a good force and form fit between the drive shaft 10 and the fastening part 18 reached.
  • a drive shaft 12 with knurled blades 24 shown for a fastener made of one material is made with a lower tensile strength than that Fastening part 18, namely for a fastening part Aluminum or magnesium.
  • the distance 30 between the knurled edges 24 is greater than the distance 28 between the knurled edges 22 in the embodiment in Fig. 3.
  • the shear strength of the knurled edges 24 the drive shaft 12 and that between the knurled blades 24 standing material of the fastening part are aligned, so that overall the greatest possible shear strength and the greatest possible permissible transferable torque is achieved.
  • the knurled edges 24 also have a greater height 34 than the knurled edges 22.
  • the knurled edges 24 in the longitudinal direction have the knurled blades 24 in the longitudinal direction a constant height 34 and a constant Cross sectional area.
  • FIG. 5 shows a drive shaft 14 with several in the longitudinal direction offset knurled edges 26.
  • knurled edges 26 each arranged between two at the same axial height in the circumferential direction Knurling 26 reaches a large distance 78 and especially with fasteners made of materials low tensile strengths, high torque are transmitted, without the material of the fastening part being sheared off is, for example aluminum, zinc, magnesium, plastic etc.
  • the knurled blades are 26 rounded in the direction of the fastening part (Fig. 6).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sliding-Contact Bearings (AREA)

Claims (8)

  1. Palier d'essuie-glace comportant un axe d'entraínement (10, 12, 14) qui est relié, par l'intermédiaire d'au moins une liaison conique (16) entre un premier élément de construction et un deuxième élément de construction (18), directement ou indirectement à un bras d'essuie-glace (20), dont le premier élément de construction est fabriqué en un matériau plus dur que le deuxième élément de construction (18) et présente des dents (22) formées sur sa surface d'enveloppe conique, au moyen desquelles, en plus d'une adhérence, un verrouillage par liaison de forme est réalisable entre le premier élément de construction et le deuxième élément de construction (18), la hauteur (32, 34) des dents (22, 24) au-dessus de la surface d'enveloppe conique étant constante,
    caractérisé en ce que
    plusieurs dents (26) identiques sont disposées de façon décalée dans la direction longitudinale.
  2. Palier d'essuie-glace selon la revendication 1,
    caractérisé en ce que
    les dents sont formées pour l'essentiel par des crêtes orientées dans la direction longitudinale.
  3. Palier d'essuie-glace selon la revendication 1 ou 2,
    caractérisé en ce que
    le premier élément de construction est formé par l'axe d'entraínement (10, 12, 14).
  4. Palier d'essuie-glace selon le préambule de la revendication 1 ou selon l'une des revendications précédentes,
    caractérisé en ce que
    la distance (28, 30, 78) dans la direction périphérique, entre respectivement deux dents (22, 24,26) à la même hauteur axiale sur le premier élément de construction, est adaptée à la résistance à la traction des matériaux utilisés pour le premier élément de construction et pour le deuxième élément de construction (18), et en cas de diminution de la résistance à la traction du matériau du deuxième élément de construction (18) relativement à la résistance à la traction du matériau du premier élément de construction, la distance (28, 30, 78) entre les dents (22, 24,26) augmente.
  5. Palier d'essuie-glace selon la revendication 4,
    caractérisé en ce que
    avec un axe d'entraínement (10, 12, 14) en acier ayant un diamètre nominal en dessous de la surface d'enveloppe conique d'environ 12 mm et ayant une dureté de surface de 135 HBS à 200 HBS, avec un deuxième élément de construction (18) en acier 30 à 40 lames (22), avec un deuxième élément de construction (18) en zinc ou aluminium 20 à 30 lames (24) et avec un deuxième élément de construction (18) en matière plastique, 5 à 15 crêtes (26) sont formées sur l'axe d'entraínement (10, 12, 14) sur la périphérie de la surface d'enveloppe conique.
  6. Palier d'essuie-glace selon le préambule de la revendication 1 ou selon l'une des revendications précédentes,
    caractérisé en ce que
    la hauteur (32, 34) des dents (22, 24) est adaptée à la résistance à la traction des matériaux utilisés pour le premier élément de construction et pour le deuxième élément de construction (18) et, en cas de diminution de la résistance à la traction du matériau du deuxième élément de construction (18) relativement à la résistance à la traction du matériau du premier élément de construction, la hauteur des dents (22, 24) augmente.
  7. Palier d'essuie-glace selon la revendication 6,
    caractérisé en ce que
    avec un axe d'entraínement (10, 12, 14) en acier ayant un diamètre nominal en dessous de la surface d'enveloppe conique d'environ 12 mm et ayant une dureté de surface de 135 HBS à 200 HBS, avec un deuxième élément de construction (18) en acier, des lames (22) ayant une hauteur (32) entre 0,8 et 1,0 mm, avec un deuxième élément de construction (18) en zinc ou aluminium, des lames (24) ayant une hauteur (34) entre 0,7 et 1,1 mm, avec un deuxième élément de construction en magnésium, des lames (24) ayant une hauteur (34) entre 0,7 et 1,1 mm, et avec un deuxième élément de construction en matière plastique, des crêtes (26) ayant une hauteur (34) entre 0,7 et 2,0 mm sont formées sur l'axe d'entraínement (10, 12, 14) sur la périphérie de la surface d'enveloppe conique.
  8. Palier d'essuie-glace selon l'une des revendications précédentes,
    caractérisé en ce que
    les dents (26) sont arrondies dans la direction du deuxième élément de construction (18).
EP00115259A 1999-08-17 2000-07-14 Palier d'essuie-glace Expired - Lifetime EP1077164B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19938967 1999-08-17
DE19938967A DE19938967A1 (de) 1999-08-17 1999-08-17 Wischerlager

Publications (3)

Publication Number Publication Date
EP1077164A2 EP1077164A2 (fr) 2001-02-21
EP1077164A3 EP1077164A3 (fr) 2002-03-13
EP1077164B1 true EP1077164B1 (fr) 2004-10-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP00115259A Expired - Lifetime EP1077164B1 (fr) 1999-08-17 2000-07-14 Palier d'essuie-glace

Country Status (2)

Country Link
EP (1) EP1077164B1 (fr)
DE (2) DE19938967A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10234613A1 (de) * 2002-07-30 2004-02-19 Robert Bosch Gmbh Scheibenwischvorrichtung und Wischerarm, insbesondere für ein Kraftfahrzeug

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3085821A (en) * 1960-04-22 1963-04-16 Gen Motors Corp Windshield wiper arm attachment
FR2679304B1 (fr) * 1991-07-16 1997-06-13 Valeo Systemes Dessuyage Dispositif d'assemblage d'une piece avec un axe, notamment pour un dispositif d'essuie-glace.
FR2716657B1 (fr) * 1994-02-28 1996-04-19 Valeo Systemes Dessuyage Essuie-glace de véhicule automobile comportant des moyens perfectionnés de liaison en rotation de la tête d'entraînement avec l'arbre moteur.
JPH09207722A (ja) * 1996-02-07 1997-08-12 Jidosha Denki Kogyo Co Ltd ワイパ装置およびワイパアームの固定方法
DE19805316A1 (de) * 1997-02-11 1998-08-13 Trico Products Corp Kopf für Scheibenwischer

Also Published As

Publication number Publication date
EP1077164A2 (fr) 2001-02-21
EP1077164A3 (fr) 2002-03-13
DE19938967A1 (de) 2001-02-22
DE50008071D1 (de) 2004-11-11

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